30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time...
-
Upload
eustacia-beasley -
Category
Documents
-
view
216 -
download
0
Transcript of 30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time...
![Page 1: 30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya- 2bya)](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649ee15503460f94bf1437/html5/thumbnails/1.jpg)
30.2 THE PRECAMBRIAN AND PALEOZOIC
![Page 2: 30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya- 2bya)](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649ee15503460f94bf1437/html5/thumbnails/2.jpg)
PRECAMBRIAN TIME
Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya-2bya) and Proterozoic eons (lasted 2b.y.). Most of Earth’s history.
![Page 3: 30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya- 2bya)](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649ee15503460f94bf1437/html5/thumbnails/3.jpg)
PRECAMBRIAN TIME
Evidence from Precambrian time periods
Cratons – the remains of Precambrian mountains and highlands. Located in shields (exposed cratons).
The oregnies that produce the Precambrian cratons.
Stromatolites: mats of trapped sediments and cyanobateria that formed layered domes.
![Page 4: 30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya- 2bya)](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649ee15503460f94bf1437/html5/thumbnails/4.jpg)
PALEOZOIC ERA
Includes six periods Cambrian Ordovician Silurian Devonian Carboniferous Permian
![Page 5: 30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya- 2bya)](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649ee15503460f94bf1437/html5/thumbnails/5.jpg)
PALEOZOIC ERA
Cambrian Period Most common
fossil is the trilobite. Ocean bound.
Warm oceans covered most of what is N. America
120 animal types have been found.
Photosynthetic algae
![Page 6: 30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya- 2bya)](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649ee15503460f94bf1437/html5/thumbnails/6.jpg)
PALEOZOIC ERA
Ordovician Period Graptolite invertebrates. (tiny, lived in colonies) Also lived in oceans Japan collide w/ N. America causing mountains in
eastern part of US. Photosynthetic algae
![Page 7: 30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya- 2bya)](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649ee15503460f94bf1437/html5/thumbnails/7.jpg)
PALEOZOIC ERA
Silurian Period The appearance
of land animals Appearance of
land plants Shallow seas in
N. America evaporated leaving a salt belt from New York to Lake Michigan.
![Page 8: 30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya- 2bya)](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649ee15503460f94bf1437/html5/thumbnails/8.jpg)
PALEOZOIC ERA
Devonian Period Age of fishes
(jawless and jawed) Lungfish fossils
(can come out of water)
First forest Scaly bark trees
Arcadian Orogeny (mountains from Newfoundland to Appalachians)
![Page 9: 30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya- 2bya)](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649ee15503460f94bf1437/html5/thumbnails/9.jpg)
PALEOZOIC ERA
Carboniferous Period (Mississippian/Pennsylvanian Periods)
Crinoids and Foraminifera (invertebrates during the Mississippian period)
Appearance of reptiles and true land vertebrates
Left huge coal deposits in the US
![Page 10: 30.2 T HE P RECAMBRIAN AND P ALEOZOIC. PRECAMBRIAN TIME Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya- 2bya)](https://reader035.fdocuments.in/reader035/viewer/2022062408/56649ee15503460f94bf1437/html5/thumbnails/10.jpg)
PALEOZOIC ERA
Permian Period Dry climate Pangea Sponges, corals and
algae Permian Extinction (251
mya) 96% of all marine ssp/ 70-
80% of land animals Climate
change/Catastrophe or Increased volcanism believed to be cause.